I gotta jump in on this one, if only because I work as a small engine mechanic and have seen so many different mowers.
Lawn-Boy makes good machines. They used to be owned by OMC, and were later bought out by Toro in the late '80's. That mower you're looking at getting is a Toro product. Under both owners, Lawn-Boy made good stuff. I like the Toro-built ones better. Toro, Airens, Snapper, Honda, and Lawn-Boy are your premium, per se, lawnmower brands. Everybody else is playing catch-up. Lol.
The only real problems Lawn-Boy mowers have (especially the later models) are ignition coil failures. They will just quit for no good reason and you have to buy another coil. Bad design, but not expensive to fix if it ever happens. Also, the Silver Series have steel (not magnesium) decks, so they aren't quite as sturdy as the premium Gold Series mowers Lawn-Boy put out. Still, if the machine runs well and looks good, I'd do the trade. The engines themselves are bulletproof as long as you run enough oil in the fuel mix.
Two quirks of Lawn Boy? Staggered-wheel decks. Strange looking, but they seem to work well. Also, the new models have plastic carburetors with a cork float and cork bowl gasket. I mean, the whole thing is plastic except for the throttle plate and jets. But they've been that way for years and work just fine...
You'll like the power, and they will envelop you in a cloud of smoke when first fired-up. I love 2-stroke lawnmowers.